B17 spark plugs in B18

DONT DO IT!!! i got them from a friend because i was in desperate need. and i get like 10 miles to the gallon. Just to warn anyone from trying

of course, you can’t put that in a b18

b17 is a special spark plug, NGK R platinum

cost $18CAD each at the dealer… damn…where can i get these for cheap?? i can’t find those in a regular store… only the dealer carry them

Well. you can do it because i am right now but you just lose gas mileage it runs fine. Do you know what would cause the loss???

it is not for use with a b18, so therefore will take more gas or reduce power,

it is the same if you do the opposite , putting b18 spark into a b17